Department of Environmental Engineering, Tsinghua University, Beijing 100084, PR China.
Waste Manag. 2013 Nov;33(11):2219-24. doi: 10.1016/j.wasman.2013.06.015. Epub 2013 Jul 8.
Many Chinese biogas plants run in the lower range of mesophilic conditions. This study evaluated the performance of a completely stirred anaerobic reactor treating pig manure at different temperatures (20, 28 and 38°C). The start-up phase of the reactor at 20°C was very long and extremely poor performance was observed with increasing organic loading rate (OLR). At an OLR of 4.3g ODML(-1)d(-1), methane production at 28°C was comparable (3% less) with that at 38°C, but the risk of acidification was high at 28°C. At low OLR (1.3g ODML(-1)d(-1)), the biogas process appeared stable at 28°C and gave same methane yields as compared to the reactor operating at 38°C. The estimated sludge yield at 28°C was 0.065g VSSg(-1) CODremoved, which was higher than that at 38°C (0.016g VSSg(-1) CODremoved).
许多中国的沼气工程都在中温条件下运行。本研究评估了在不同温度（20、28 和 38°C）下完全搅拌式厌氧反应器处理猪粪的性能。在 20°C 下，反应器的启动阶段非常长，并且随着有机负荷率（OLR）的增加，观察到性能极差。在 4.3g ODML(-1)d(-1)的 OLR 下，28°C 下的甲烷产量与 38°C 下的甲烷产量相当（少 3%），但 28°C 下酸化的风险很高。在低 OLR（1.3g ODML(-1)d(-1)）下，28°C 下的沼气工艺似乎稳定，与在 38°C 下运行的反应器相比，产生相同的甲烷产量。在 28°C 下估计的污泥产率为 0.065g VSSg(-1) COD去除，高于 38°C（0.016g VSSg(-1) COD去除）。
